Iphone 4 not restoring

I purchased an ATT Iphone 4 (with 5.1.1) off craigslist a few weeks ago and apparently it was tether jailbroken with GreenPoison. I proceeded to jailbreak it (untethered) with Redsnow 0.9.12b2 and it worked fine. Now I am in the process of trying to get it restored via Itunes to it's factory settings. I am using Redsnow to force it into DFU mode. When I restore using Itunes it hangs up on "restoring iphone software" - the bar stops after getting about half way. On the Iphone the apple logo and process bar freeze also.

So after messing around and frustrating myself for about a week with this restore I was finally able to get it to restore. I was literally on my last straw and about to just sell a bricked Iphone on craigslist.

It ended up being the ipsw file that Itunes downloaded. (Yes, even after multiple deletes and re-downloads!). So hopefully this will help someone out in the future.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.